A. their pale skins were burnt by the sun B. they were burnt by the fierce sun C. the sun burnt their tender skins D. the sun burning their pale skins 参考答案:C 答案解析:本题测试句子结构。全句意思是:蓝蓝的天空中太阳照耀着,把他们娇嫩的皮肤晒的够戗。选择部分的主语必须是shining的逻辑主语,所以必须选择主语含有sun的句子,而D)空又不是句子。
第31题: [单项选择]下述()不是数据仓库的基本特征。 A. 面向主题 B. 集成 C. 反映历史变化 D. 包括当前准确数据 参考答案:D 答案解析: